Ice cores in areas such as Greenland, Antarctica, and other areas that are cold allows the snow to accumulate over the years and each new layer of snow compress the snow into ice. Though in these ice cores are air bubbles that contains a sample of the atmosphere during that snowfall. This allows climatologist determined how the climate has changed over time and reconstruct the temperatures of the time period and see how carbon dioxide have influenced the earth climate. With the air bubbles in the ice, climatologist has determined that carbon dioxide has increased by 33% in the past million years. Ice Cores allows climatologist to learned how earth climate has changed throughout the years.
9. Milankovitch cycles
Milankovitch …show more content…
The surface trade winds drive cold currents from South America toward Indonesia and cold deep water wells near Peru. The winds and currents weaken, and warm, low-pressure conduction shift eastward, bringing storms to the Americas during El Nino years. As the northern jet stream that is normally over Canada splits and is drawn south over the United States. This pills moist airs from the Pacific and Gulf of Mexico inland creating intense storms and heavy rains from California to the Midwestern states. It is believed that the El Nino condition is intensified and are becoming more frequency because of global climate change. This is because the Oceans surface temperatures are increasing and spreading throughout the ocean that creates El Nino …show more content…
IPPC in 2007, concluded that 90% of the observed climate change is caused by human activity. They also predicted that in 2100 that the annual temperature would increase from2 – 11 degrees Fahrenheit and that sea levels would rise about 7 -23 inches. The IPCC has determined that the main caused of climate change is because of human activities that emit greenhouse gases into the atmosphere, which in result warms the whole entire climate of the earth.
12. tipping point
The tipping point is the point of no return in projecting the earth from global warming. That if we do not control and decrease our emissions that in the next couple of decades there will be no stop in the melting of permafrost and ice capes throughout the earth. The tipping point is when as humans have gone too far in activities that cause global warming in which global warming will not preventable.
13. IPCC 5th Assessment Report